Which lifestyle modification should be prioritized for a patient with a thoracic aortic aneurysm to reduce progression risk?

For a patient with a thoracic aortic aneurysm (TAA), controlling and managing blood pressure is the single most important lifestyle modification to slow progression and reduce the risk of rupture or dissection. Hypertension is the primary modifiable risk factor for TAA growth, as elevated systemic arterial pressure exerts wall stress on the weakened aortic tissue. Reducing blood pressure through a combination of antihypertensive medications (especially beta-blockers and ACE inhibitors), dietary modifications, stress management, and adherence to medical therapy significantly decreases hemodynamic stress on the aneurysm wall. Increasing physical exercise can be dangerous in TAA because vigorous exertion raises blood pressure and heart rate acutely, increasing the risk of rupture or dissection; patients are typically advised to avoid heavy lifting and high-intensity isometric exercise. Maintaining a low-sodium diet is helpful for managing blood pressure as a component of the overall blood pressure control strategy, but it is not the priority in isolation. Weight loss strategies can also help reduce blood pressure and are beneficial as part of comprehensive care. However, blood pressure management encompasses and supersedes these individual interventions, making it the overarching priority. Tight blood pressure control directly targets the pathophysiological mechanism driving aneurysm growth and rupture risk.